Energy absorber, a method for making an energy absorber, and several items which include such an energy absorber

ABSTRACT

An energy absorber  10  which is made by a new and novel process and which includes beads, such as beads  12, 14 , and  16  which are selectively coupled together and reside upon an elastomeric surface  90 . The beads, such as beads  12, 14 , and  16  are formed, in one non-limiting embodiment, from a ceramic material and provide enhanced energy absorption characteristics which allows the created energy absorber  10  to be selectively “programmed” to be operatively deployed in a wide range of environments.

FIELD OF THE INVENTION

The present invention generally relates to an energy absorber, to amethod for making an energy absorber, and to several tangible itemswhich include such an energy absorber and more particularly, to anenergy absorber which may be made by a highly efficient process andwhich provides enhanced energy absorption properties while beingselectively adapted for use in several diverse types of tangible items.

BACKGROUND OF THE INVENTION

An energy absorber is typically used to absorb the energy which isimparted to a surface or substrate of an object, due to a collision orimpact with another object or entity, thereby reducing the likelihood ofdamage to the colliding object or entity and, in many cases,concomitantly reducing the likelihood of damage to the objectupon/within which the energy absorber is operatively deployed.

While such an energy absorber does provide the foregoing benefits, it isrelatively costly to manufacture, e.g., (requires oil or is “oilbased”), requires a relatively complex manufacturing process, and doesnot absorb a great deal of energy because it tends to become stifferwhen it becomes dynamically compressed under a load. Further, thecurrent energy absorber designs are not readily modifiable or“programmable” to be adapted for use in various diverse types of energyabsorption environments and are not adapted for use in diverse types oftangible items due to their operative intolerance of heat and theirrelatively high cost and complex manufacturing process.

There is therefore a need for a new and improved energy absorber; for anew and improved method for making such an energy absorber; and foritems which operatively include such an energy absorber. The presentinvention provides these improvements and needed benefits in a new andnovel manner.

SUMMARY OF THE INVENTION

It is a first non-limiting object of the present invention to provide aenergy absorber which overcomes some or all of the drawbacks of currentenergy absorbers, such as but not limited to those which have beenpreviously delineated above.

It is a second non-limiting object of the present invention to provide amethod for making an energy absorber which overcomes some or all of thedrawbacks of current energy absorber creation/manufacturingmethodologies, including but not limited to those drawbacks which havebeen delineated above.

It is a third non-limiting object of the present invention to provideitems which include new and novel energy absorbers which are made inaccordance with the teachings of the inventions.

According to a first non-limiting aspect of the present invention, anenergy absorber is provided and includes a plurality of coated andcoupled beads which are selectively coupled to form a certain shape.

According to a second non-limiting aspect of the present invention, anenergy absorber is provided and includes a plurality of coupled beadswhich fixedly and operatively reside upon an elastomeric material.

According to a third non-limiting aspect of the present invention, aheadliner is provided and includes a first generally surface portionwhich is selectively placed within the passenger compartment of avehicle and a second and opposed surface portion upon which at least oneenergy absorber is selectively and operatively deployed, wherein the atleast one energy absorber comprises a plurality of coupled beads whichare operatively deployed upon an elastomeric material.

According to a fourth non-limiting aspect of the present invention, avehicular hood is provided and includes a generally curved portion whichis selectively and movably disposed upon a vehicle and having a firstouter surface which is exposed to the ambient environment in which thevehicle operates, wherein the hood further having an opposed and innersurface upon which an energy absorber is deployed.

According to a fifth non-limiting aspect of the present invention, aninstrument panel is provided and includes a base member; an energyabsorber which is operatively deployed upon the base member; and a faciamember which substantially encapsulates the base member and the energyabsorber.

According to a sixth non-limiting aspect of the present invention, amethod for making an energy absorber is provided and includes the stepsof forming a mold having a certain absorber creation portion of acertain shape; providing a plurality of beads; providing resin; mixingthe beads with the resin, effective to form a relatively thin layer ofresin on the beads; placing the resin coated beads in the absorbercreation portion of the mold; molding the contained resin coated beads,thereby forming the contained resin coated beads into the certain shape;and curing the molded beads, thereby forming the energy absorber.

These and other aspects, features, and advantages of the presentinvention will become apparent from a reading of the following detaileddescription of the preferred embodiment of the invention, including thesubjoined claims, and by reference to the following drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an energy absorber manufacturing assemblywhich is made in accordance with the teachings of the preferredembodiment of the invention;

FIG. 2 is a top view of an energy absorber which is made in accordancewith the teachings of the preferred embodiment of the invention;

FIG. 3 is a bottom view of the energy absorber which is shown in FIG. 2;

FIG. 4 is a side perspective view of the energy absorber which is shownin FIGS. 2 and 3;

FIG. 5 is a bottom view of a vehicular headliner which is made inaccordance with the teachings of the preferred embodiment of theinvention;

FIG. 6 is a partial perspective view of a vehicular instrument panelwhich is made in accordance with the teachings of the preferredembodiment of the invention and including an energy absorber of thepresent invention which is shown in phantom;

FIG. 7 is a partial sectional view of the vehicular instrument panelwhich is shown in FIG. 6 and which is taken along view line 7-7′;

FIG. 8 is a side view of a vehicle which is made in accordance with theteachings of the preferred embodiment of the invention and including anenergy absorber of the present invention which is shown in phantom;

FIG. 9 is a bottom view of the hood portion of the vehicle which isshown in FIG. 8;

FIG. 10 is a partial side sectional view of a bumper assembly which ismade in accordance with the teachings of the preferred embodiment of theinvention; and

FIG. 11 is a top view of the mold which is shown in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION

Referring now to FIGS. 2-4, there is shown an energy absorber 10 whichis made in accordance with the teachings of the preferred embodiment ofthe invention.

Particularly, it should be realized that the energy absorber 10 may beof any size, shape, and geometrical configuration and that the presentlyshown size, shape, and overall geometrical configuration is forillustrative purposes only and is not meant to limit the presentinvention in any manner whatsoever.

As shown, the energy absorber 10 includes several beads, such as beads12, 14, and 16 which are selectively and operatively “coupled together”to form the energy absorber 10. The bottom surface 18 of the energyabsorber 10, in one non-limiting embodiment of the invention, is formedfrom a material 20 which, in one non-limiting embodiment of theinvention comprises an elastomeric material, such as polyurea or Daclarwhich may be commercially obtained from The LeFarge corporation andwhich is a water based Bituminous material. Hence, the beads, such asbeads 12, 14, and 16 are fixedly coupled together and fixedly resideupon the material 20. In one non-limiting embodiment of the invention,each of the beads, such as beads 12, 14, and 16 are substantiallyidentical and comprise ceramic beads which are commercially known as“Macrolite” beads and which may be obtained from the 3M corporation inMinneapolis, Minn. and/or from The Kinetico Corporation in CahogoaFalls, Ohio. As further shown, the coupled beads form many crevices orinterstices, such as crevices or interstices 22, 24, and 26 within theenergy absorber 10. It should be appreciated that other types of beadsmay be used, including those made from other polymer material such asexpanded polystyrene or polypropylene.

To understand the methodology involved in manufacturing the energyabsorber 10, reference is now made to FIGS. 1 and 11 where energyabsorber creation assembly 28 is shown.

Particularly, the energy absorber creation assembly 28 includes a mixer30, such as a commercially available Nauto mixer or a commerciallyavailable pill coater. The mixer 30 is physically and communicativelycoupled to a pump assembly 32 which may selectively comprise aprogressive cavity pump which is commercially available from The LiquidControls Corporation (Greyco). The assembly 28 further includes a mold40, such as an open mold, having an energy absorber creation orformation portion 42. The mold 40 is coupled to a selectively movableconveyor assembly 50 which allows the mold 40 to be selectively moved tovarious locations. The assembly 28 further includes a curing assembly 60which may comprise a selective heat generation assembly, such as amicrowave assembly or an oven.

In the energy absorber manufacturing process, a quantity of resin 70 isselectively communicated into the mixer 30 along with a quantity of thebeads 80 (the beads 80 may each be substantially identical to the beads12, 14, and 16). Further, the resin 70 may comprise a commerciallyavailable and low viscosity polymer adhesive material, a water basedepoxy material, a water based latex material, or a polyester material.The mixer 30 mixes the beads 80 and the resin material 80, therebycausing each of the received beads 70 to be substantially encapsulatedwith a respective and relatively thin layer of resin material 80. In onenon-limiting embodiment, each layer is about 0.1 centimeters to about0.3 centimeters thick, although other thicknesses may be employed. Themixer 30 then selectively communicates the coated beads 70 to the pumpassembly 32 and the pump assembly 32 selectively communicates thesecoated beads 70 to the portion 42 of the mold 40. It should beappreciated that the shape of the portion 42 is made to be substantiallysimilar to the desired shape of the produced energy absorber 10.

Further, in one non-limiting embodiment of the invention, before thecoated beads 70 are received into the portion 42, a relatively thinlayer (e.g., about 0.1 to about 0.3 millimeters thick) of material 90 isplaced on the surface of the portion 42. The thickness of the depositedmaterial 90 may vary as desired. In one non-limiting embodiment of theinvention, the material 90 comprises polyurea, Daclar, or substantiallyany other desired elastomeric material which may be commerciallyavailable.

After the beads 70 are placed within the portion 42, in one non-limitingembodiment of the invention, the selectively disposed beads 70 areselectively compressed within the portion 42 (e.g., selectively “patteddown”) and moldably formed, within the portion 42, into the shape of theenergy absorber 10. This molding operation causes the material 90 toadhere to the bottom surface of the beads 70 (see, for example, FIG. 3)and causes the beads 70 to be coupled together, thereby forming theenergy absorber 10. The mold 40 is then conveyed into or made to be inclose proximity to the curing assembly 40 where the disposed and coatedbeads 70 are selectively heated, and thereby cured which allows theproduced energy absorber 10 to be readily removed from the mold 50.

It should be appreciated that this curing process is relatively quickand efficient because the interstices, such as crevices 22, 24, and 26,formed by the coupled beads 70 allows the heat, which is generated bythe curing assembly 60, to quickly penetrate the beads 70 and allowsmoisture to readily leave the formed assembly 10 and the relatively thincoating of material 80 on these beads 70 allows the received heat toquickly dry the beads 70. In this manner, cycle time is dramaticallyreduced and overall manufacturing efficiency is dramatically enhanced.

The produced energy absorber 10 may be selectively and operativelydeployed within and/or upon a large amount of diverse items. Referenceis now made to FIGS. 5 and 8, where there is shown a vehicle headliner100 which is made in accordance with the teachings of the preferredembodiment of the invention.

Particularly, the headliner 100 includes a first surface 102 which isadapted to be disposed within the passenger compartment 103 of avehicle, such as vehicle 150, and a second and opposed surface 104 whichis adapted to be selectively disposed between the roof 107 of a vehicle,such as vehicle, 150 and the surface 102. It should be appreciated thatthe perimeter portion 106 of the headliner 100 cooperates with thevehicle, such as vehicle 150, to allow the foregoing assembledarrangement (e.g., the perimeter portion 106 is attached to the frameportion (not shown) of the vehicle, such as vehicle 150).

According to the teachings of the invention, at least one and possiblyseveral energy absorbers, such as energy absorber 110 (which may besubstantially similar to energy absorber 10) may be selectively attachedto the surface 104 (by glue or other conventional attachment strategies)and such energy absorbers 110 absorb the energy generated by the impactof an individual (e.g., the head of an individual) to the surface 102which may occur, by way of example and without limitation, in a rollovertype of accident or event. In this situation, the beads 70 readilycompress or are crushed and effectively protect the head or otherportion of the individual who contacts the headliner 100.

Reference is now made to FIGS. 6 and 7 where a vehicle instrument panel120 is shown. Particularly, the instrument panel 120 includes a base orstructural member 122 and facia or a “trim” type member 124 whichsubstantially encapsulates the member 122 and provides an overallpleasing appearance to the passengers of a vehicle. According to theteachings of the present invention, at least on energy absorber 130,which may be substantially similar to the energy absorber 10, isoperatively deployed between and coupled to the member 122 and the trimportion 124 and provides absorption in the area of the instrument panel120 which is proximate to the knee of a driver or other occupant of avehicle. In this manner, the deployed energy absorber 130 readilyabsorbs and cushions the impact of a knee or other portion of the bodyof an individual, thereby preventing or reducing the likelihood ofinjury.

Reference is now made to FIGS. 8 and 9, where there is shown a vehicle150 having a hood 152. Particularly, according to the teachings of thepresent invention, the hood 152 is movably disposed upon the vehicle 150in a conventional manner and includes a first surface 155 which providesa pleasing overall appearance to those in close proximity to the vehicle150 and which is deployed in the ambient environment 160 that thevehicle 150 resides. The hood 152 also has an under surface or portion170 which forms an opposite surface form surface 155, is typicallyhidden form view, and is normally disposed in close proximity to anengine 171. Upon this surface 170, an energy absorber 180 (which may besubstantially similar to energy absorber 10) is operatively disposed(e.g., glued to the surface 170 or attached to the surface 170 by otherconventional techniques and strategies). In this manner, the energyabsorber 180 absorbs the energy generated by the impact of a person uponthe hood 152.

Reference is now made to FIG. 10, where there is shown a bumper assembly200 and which typically includes a fascia or trim portion 202 whichprovides a pleasing overall visible appearance to those in closevicinity to a vehicle, such as vehicle 150. Typically, the bumperassembly 200 includes a beam member 204 (e.g., made from steel or othermaterials) which substantially extends along the width of the vehicle150 and a foam member 206 which is typically linearly coextensive to thebeam member 204 and which is typically attached to the beam member 204.The trim portion 202 typically encapsulates the beam member 204 and thefoam member 206. According to a first embodiment of the invention, anenergy absorber 222, which may be substantially similar in structure butnot in shape to the energy absorber 10, is provided and is made to belinearly coextensive to and is attached to the beam member 204 and thefacia member 202. In this first non-limiting embodiment of theinvention, this energy absorption member 222 replaces the foam member206. In a second non-limiting embodiment of the invention, the energyabsorber member 222 is operatively “sandwiched” between and coupled thebeam member 204 and the foam member 206 and provides greatly enhancedenergy absorption capabilities.

It is to be understood that the foregoing inventions are not limited tothe exact construction or methodology which has been delineated in thisdescription, but that various changes and modifications may be madewithout departing from the spirit and the scope of the inventions as aremore fully defined in the following claims. Hence, it should beappreciated that the foregoing energy absorbers, such as energy absorber10, may be readily constructed to provide optimal absorptioncapabilities by causing the size of the deployed beads 70 to be larger,and/or causing the amount or density of the deployed beads 70 toincrease, thereby increasing the absorption capability of the absorber,such as energy absorber 10.

Further, in one non-limiting embodiment, the size, shape, and geometricconfiguration of all of the deployed heads 70 is substantiallyidentical, but in another embodiment beads of different sizes, shapes,and geometric configurations are utilized. For example, a portion of theabsorber may have large beads or densely populated beads 70 while asecond portion of the absorber may not be as densely populated or mayinclude smaller beads. The first portion is therefore deployed in aknown “high impact” area, while the second portion of the same absorbermay be deployed in a lower impact area. In these manner, an absorber maybe “programmed” or selectively created to desirably control the energymanagement between two substrates or surfaces by providing a selectivelycrushable honeycombed media (e.g., the coupled beads 70) that has ageometric configuration that can be tailored for force and crush energylevels. Further, it should be appreciated that the previously delineatedenergy, absorber, such as energy absorber 10, is heat intolerant orresistant and thus may be selectively and operatively deployed in “hot”environments, such as near an engine, and may also be operativelydeployed upon/within many diverse items. Further, because the beads 70are “non-oil based”, the absorber, such as absorber 10 has a greatlyreduced manufacturing cost relative to that associated with currentenergy absorbers.

1. A method for making an energy absorber comprising the steps offorming a mold having a certain absorber creation portion of a certainshape; providing a plurality of beads; providing resin; mixing saidbeads with said resin, effective to form a relatively thin layer ofresin on said beads; placing the resin coated beads in said absorbercreation portion of said mold; molding said contained resin coatedbeads, thereby forming said contained resin coated beads into saidcertain shape; and curing said molded beads, thereby forming said energyabsorber.
 2. The method of claim 1 further comprising the step ofplacing an elastomeric material into said absorber creation portion ofsaid mold before placing said resin coated beads into said absorbercreation portion.
 3. The method of claim 2 wherein said beads compriseceramic beads.
 4. The method of claim 2 wherein said ceramic beads arecoated with a polymer adhesive material.
 5. The method of claim 3wherein said ceramic beads are coated with a water based latex material.6. The method of claim 3 wherein said ceramic beads are coated with awater based epoxy material.
 7. The method of claim 3 wherein saidceramic beads are coated with a polyester material.
 8. The method ofclaim 3 wherein said ceramic beads are each substantially spherical. 9.The method of claim 8 wherein said ceramic beads are each substantiallyidentical.
 10. The method of claim 9 wherein said plurality of coatedbeads cooperatively form a plurality of interstices.